<template>
    <div>
        <!-- 面包屑导航区域 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>商品管理</el-breadcrumb-item>
            <el-breadcrumb-item>商品分类</el-breadcrumb-item>
        </el-breadcrumb>

        <!-- 卡片视图区域 -->
        <el-card>
            <el-row>
                <el-col>
                    <el-button type="primary" @click="openAddCate">添加分类</el-button>
                </el-col>
            </el-row>

            <!-- 表格 -->
            <tree-table class="treeTable" :data="catelist" :columns="columns" :selection-type="false" :expand-type="false"
                show-index index-text="#" border :show-row-hover="false">
                <!-- 是否有效 -->
                <template slot="isok" slot-scope="scope">
                    <i class="el-icon-success" v-if="scope.row.cat_deleted === false" style="color: lightgreen"></i>
                    <i class="el-icon-error" v-else style="color: red"></i>
                </template>
                <!-- 排序 -->
                <template slot="order" slot-scope="scope">
                    <el-tag size="mini" v-if="scope.row.cat_level === 0">一级</el-tag>
                    <el-tag type="success" size="mini" v-else-if="scope.row.cat_level === 1">二级</el-tag>
                    <el-tag type="warning" size="mini" v-else>三级</el-tag>
                </template>
                <!-- 操作 -->
                <template slot="opt">
                    <el-button type="primary" icon="el-icon-edit" size="mini">编辑</el-button>
                    <el-button type="danger" icon="el-icon-delete" size="mini">删除</el-button>
                </template>
            </tree-table>

            <!-- 分页区域 -->
            <el-pagination @size-change="handleSizeChange" @current-change="handleCurrentChange"
                :current-page="queryInfo.pagenum" :page-sizes="[3, 5, 10, 15]" :page-size="queryInfo.pagesize"
                layout="total, sizes, prev, pager, next, jumper" :total="total">
            </el-pagination>
        </el-card>

        <!-- 添加分类的弹窗 -->
        <el-dialog :close-on-click-modal="false" title="添加分类" :visible.sync="addCateDialogVisible" width="50%"
            @close="addCateDialogClosed">
            <!-- 内容主体区域 -->
            <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="70px">
                <el-form-item label="分类名称" prop="cat_name">
                    <el-input v-model="addForm.cat_name"></el-input>
                </el-form-item>
                <el-form-item label="父级分类">
                    <!-- props 用来指定配置对象 -->
                    <el-cascader @change="parentCateChanged" v-model="selectedOptions" :props="cascaderProps"
                        expand-trigger="hover" :options="parentCateList" clearable change-on-select>
                    </el-cascader>
                </el-form-item>
            </el-form>

            <!-- 底部区域 -->
            <span slot="footer" class="dialog-footer">
                <el-button @click="addCateDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="saveRoleInfo">确 定</el-button>
            </span>
        </el-dialog>

    </div>
</template>
<script>
export default {
    data() {
        return {
            catelist: [],
            queryInfo: {
                type: [],
                pagenum: 1,
                pagesize: 10
            },
            total: 0,
            columns: [
                {
                    label: '分类名称',
                    prop: 'cat_name'
                },
                {
                    label: '是否有效',
                    prop: 'cat_deleted',
                    type: 'template',
                    template: 'isok'

                },
                {
                    label: '排序',
                    prop: 'cat_level',
                    type: 'template',
                    template: 'order'

                },
                {
                    label: '操作',
                    type: 'template',
                    template: 'opt'

                },
            ],
            addCateDialogVisible: false,
            parentCateList: [],
            addForm: {
                cat_name: '',
                // 父级分类的Id
                cat_pid: 0,
                // 分类的等级，默认要添加的是1级分类
                cat_level: 0,
            },
            addFormRules: {
                cat_name: [
                    { required: true, message: '请填写分类名称', trigger: 'blur' }
                ]
            },
            // 指定级联选择器的配置对象
            cascaderProps: {
                value: "cat_id",
                label: "cat_name",
                children: "children",
            },
            selectedOptions: [],
        }
    },
    created() {
        this.getCate()
    },
    methods: {
        async getCate() {
            const res = await this.$http.get('categories', { params: this.queryInfo })
            // console.log(res);
            if (res.status == 200) {
                this.catelist = res.data.data.result
                this.total = res.data.data.total
            }
        },
        handleSizeChange(newSize) {
            this.queryInfo.pagesize = newSize;
            this.getCate();
        },
        handleCurrentChange(newPage) {
            this.queryInfo.pagenum = newPage;
            this.getCate();
        },

        // 打开添加分类弹窗
        async openAddCate() {
            const res = await this.$http.get('categories', {
                params: { type: 2 },
            })

            // console.log(res);
            if (res.status == 200) {
                this.parentCateList = res.data.data
            }

            this.addCateDialogVisible = true
        },

        parentCateChanged() {
            // console.log(this.selectedOptions);
            if (this.selectedOptions.length > 0) {
                // 提交请求的参数中父类id一定是selectedOptions数组中的最后一个
                this.addForm.cat_pid = this.selectedOptions[this.selectedOptions.length - 1]

                this.addForm.cat_level = this.selectedOptions.length
            } else {
                this.addForm.cat_pid = 0
                this.addForm.cat_level = 0
            }
        },

        // 监听对话框的关闭事件，重置表单数据
        addCateDialogClosed() {
            this.$refs.addFormRef.resetFields();
            this.selectedOptions = [];
            this.addForm.cat_level = 0;
            this.addForm.cat_pid = 0;
        },

        saveRoleInfo() {
            this.$refs.addFormRef.validate(async valid => {
                if (valid) {
                    const res = await this.$http.post('categories', this.addForm)
                    // console.log(res);
                    if (res.status !== 200) {
                        return this.$message.error("添加分类失败！");
                    }

                    this.$message.success("添加分类成功！");
                    this.getCate();
                    this.addCateDialogVisible = false;
                }
            })
        }
    }
}
</script>
<style lang="less" scoped>
.treeTable {
    margin-top: 15px;
}

.el-cascader {
    width: 100%;
}
</style>
